EP 0479322 A2 19920408 - Apparatus for detecting transducer movement.
Title (en)
Apparatus for detecting transducer movement.
Title (de)
Gerät zur Erfassung von Wandlerbewegung.
Title (fr)
Dispositif pour détecter le mouvement d'un transducteur.
Publication
Application
Priority
US 59223090 A 19901003
Abstract (en)
An apparatus for photo-optically detecting transducer motion using a photodetector resiliently suspended inside the transducer housing and photo-optically coupled to a light source. During movement the inertia effect of the photodetector along with the resilient suspension system causes the changes in the photo-optical coupling between the photodetector and the light source. The inertia effect of the photodetector is enhanced by adding a mass to the photodetector. Either the magnitude or the phase of the photodetector output is monitored to detect movement. In another embodiment, a light emitter is resiliently suspended so that movement induced changes in the position of the light emitter alter the coupling of light to one or more light detectors. <IMAGE>
IPC 1-7
IPC 8 full level
A61B 5/024 (2006.01); A61B 5/11 (2006.01); G01P 13/00 (2006.01)
CPC (source: EP US)
A61B 5/02416 (2013.01 - EP US); A61B 5/721 (2013.01 - EP US); G01P 13/00 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE FR GB IT LI
DOCDB simple family (publication)
US 5055671 A 19911008; CA 2052682 A1 19920404; EP 0479322 A2 19920408; EP 0479322 A3 19921021
DOCDB simple family (application)
US 59223090 A 19901003; CA 2052682 A 19911003; EP 91116997 A 19911004